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N-shell

[en-shel]
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noun Physics.
  1. the fourth shell of electrons surrounding the nucleus of an atom and containing, when filled, 32 electrons having principal quantum number 4.
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Compare K-shell, L-shell, M-shell.

Origin of N-shell

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018